I'm no expert on this but try looking at:
/sys/kernel/debug/ieee80211/phy0/ath9k/xmit
there are also statistics from the rate algorithm. try askiung on
openwrt-devel mailinglist.
there is an
ar9344 datasheet online which is much more close, only some
features are different, but it's the very same chip.
try google for ar9344 datasheet
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Alexander Couzens
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